Study of ψ(2S) Decay to τ Lepton Pairs

BES Collaboration

Chinese Physics C> 1995, Vol. 19> Issue(7) : 577-584

Study of ψ(2S) Decay to τ Lepton Pairs

BES Collaboration

Institute of High Energy Physics, Academia Sinica, Beijing 100039

Abstract
HTML
Reference
Related

PDF

Abstract：
The decay ψ(2S) →τ^＋τ^－ has been studied by using the 1.27 million ψ(2S) events produced from the BES experiment at the BEPC collider. The τ^＋τ^－ decay branching ratio is for the first time measured to be (3.54±0.61±0.63)×10^－3, which is consistent with the prediction of the hypothesis of e-μ-τ universality. Combiningthis value with the previous leptonic data of ψ(2S), the total width of the ψ(2S) is found to be 251±37keV.

References

[1]

Feldmanetal,Phys.Lett.,33C（1977）285;Hilgeretal,Phys.Rev.Lett.,35（1975）625.[2]丁慧良等，高能物理与核物理，16（1992）769;J.Z.Baietal.,Phys.Rev.Lett,69（1992）3021;J.Z.Baietal,Nucl.Instr.Method,A344（1994）319-334.[3]许榕生等，高能物理与核物理，15（1991）447.[4]吴济民，赵培英，高能物理与核物理，17（1993）379;吴济民，在（3686）共振态附近e+e-→τ+τ的截面行为，BES合作组杭州年会报告，1994年7月。[5]崔象宗，数据的大角度亮度，BES内部报告，1994年4月。[6]苑长征，由（2S）→π+π-J/衰变测量J/轻子道衰变分支比，中国科学院高能所，硕土论文。1994年。[7]ParticleDataGroup,LowellS.Brown et.al,Phys.Rev,D50,3（1994）.

[1]	M. Alekseev , A. Amoroso , R. Baldini Ferroli , I. Balossino , M. Bertani , D. Bettoni , F. Bianchi , J. Chai , G. Cibinetto , F. Cossio , F. De Mori , M. Destefanis , R. Farinelli , L. Fava , G. Felici , I. Garzia , M. Greco , L. Lavezzi , C. Leng , M. Maggiora , A. Mangoni , S. Marcello , G. Mezzadri , S. Pacetti , P. Patteri , A. Rivetti , M. Da Rocha Rolo , M. Savrié , S. Sosio , S. Spataro , L. Yan . A model to explain the angular distribution of $ {{{J /\psi}}} $ and $ {{\psi(2S)}} $ decay into $ {\Lambda \overline{\Lambda}} $ and ${\Sigma^0 \overline{\Sigma^0}} $. Chinese Physics C, 2019, 43(2): 023103. doi: 10.1088/1674-1137/43/2/023103
[2]	Ai-Jun Ma , Ya Li , Wen-Fei Wang , Zhen-Jun Xiao . S-wave resonance contributions to B_(s)⁰→η_c(2S)π⁺π^-in the perturbative QCD factorization approach. Chinese Physics C, 2017, 41(8): 083105. doi: 10.1088/1674-1137/41/8/083105
[3]	M. Ablikim et al (BESⅡ collaboration) . First evidence of ψ(2S)→Ω^-Ω⁺. Chinese Physics C, 2012, 36(11): 1040-1045. doi: 10.1088/1674-1137/36/11/002
[4]	WEI Dai-Hui , YANG Yong-Xu . Pseudoscalar mixing in J/ψ and ψ(2S) decay. Chinese Physics C, 2010, 34(12): 1785-1790. doi: 10.1088/1674-1137/34/12/002
[5]	JIANG Xing-Yu , FANG Shuang-Shi , ZHU Yu-Can , LU Gong-Ru . Pseudoscalar-Meson Mixing in ψ(2S)→VP Decays. Chinese Physics C, 2006, 30(8): 724-730.
[6]	HUANG Yi-Bin , YAN Mu-Lin , WANG Xiao-Jun . Resummation Study on Decay ρ→ππ in U(2)_L×U(2)_R Chiral Theory of Mesons. Chinese Physics C, 2004, 28(4): 340-344.
[7]	YUE Chong-Xing , ZHAO Ye , LI Hong , ZHAO Qi . Lepton Flavor Violating Z→l_il_jin Flavor-Universal Topcolor-Assisted Technicolor Models. Chinese Physics C, 2003, 27(12): 1070-1073.
[8]	QIAN Hai-Jie , SU Run , WANG Jia-Ou , WU Xiang , DONG Yu-Hui , WU Zi-Yu , WANG Yu-Tian , WEI Long , , . O 1s2p2p Auger Process Investigation of the Pr_1-x Sr_x MnO₃ System. Chinese Physics C, 2003, 27(S1): 40-44.
[9]	WANG Ping , YUAN Chang-Zheng , MO Xiao-Hu . Contribution of One-Photon Annihilation at ψ(2S) in e⁺e^－ Experiment. Chinese Physics C, 2003, 27(6): 465-473.
[10]	FU Cheng-Dong , MO Xiao-Hu , ZHANG Jia-Wen , ZHU Yong-Sheng , YUAN Chang-Zheng , DONG Xin , DONG Liao-Yuan . Fast Reconstruction of ψ(2S) Data and Corresponding Quality Supervision. Chinese Physics C, 2003, 27(8): 653-658.
[11]	Li Panlin , Deng Chengfeng , Wang Lilian , Xu Mengjie . Calculation of the Productive Dilepton Spectrum (M≤4GeV/c²) in ²³⁸U+²³⁸U Collisions at E_c,m≈200GeV/u. Chinese Physics C, 1999, 23(7): 693-700.
[12]	Liu Yaoyang , Sun Lazhen , Jiang Xiangdong . SU(3)_C×SU(2)_I×U(1)_Y Theory of Composite Leptons. Chinese Physics C, 1998, 22(11): 996-1003.
[13]	BES Collaboration . Abnormal Suppression of Vector-Tensor Decays of ψ(2S). Chinese Physics C, 1997, 21(1): 89-96.
[14]	BES Collaboration . Study of ψ(2S)Decays into pπ and KK. Chinese Physics C, 1996, 20(6): 481-490.
[15]	BES Collaboration . Determination of J/ψ Leptonic Branching Fraction Via ψ(2S)→π⁺π^－J/ψ. Chinese Physics C, 1996, 20(2): 97-106.
[16]	Yu Zhaoxian , Liu Yehou , Li Qinglin , Liang Bifang . Study of SU(2)_q,s Coherent State by Using (q,s) Deformed Harmonic Oscillators of SU(2)_q,s Quantum Algebra. Chinese Physics C, 1995, 19(3): 258-263.
[17]	BES Collaboration . New Suppression Mode of the ψ(2S) Hadronic Decay. Chinese Physics C, 1995, 19(1): 93-96.
[18]	BES Collaboration . Experimental Study of Resonance f₂(1270) in the J/ψ Hadronic Decay. Chinese Physics C, 1993, 17(2): 97-106.
[19]	CHEN Qi-Zhou , LI Zhi-Bing , HE Bao-Peng , LUO Xiang-Qian , GUO Shuo-Hong . THE WEAK INTERACTION MATRIX ELEMENTS OF │ΔS│=2 ON LATTICE. Chinese Physics C, 1988, 12(4): 459-464.
[20]	SONG Xiao-Tong , CHING Cheng-Rui , HO Tso-Hsiu . APPROXIMATE B.S. WAVE FUNCTIONS FOR AN ELECTROMAGNETIC BOUND SYSTEM OF SPINS (1/2, 1/2) OR (1/2, 1/2) WITH UNEQUAL MASSES. Chinese Physics C, 1984, 8(5): 531-538.

Access

Get Citation

BES Collaboration. Study of ψ(2S) Decay to τ Lepton Pairs[J]. Chinese Physics C, 1995, 19(7): 577-584.

BES Collaboration. Study of ψ(2S) Decay to τ Lepton Pairs[J]. Chinese Physics C, 1995, 19(7): 577-584. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1900-01-01
Revised: 1900-01-01

Article Metric

Article Views(2920)
PDF Downloads(440)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Study of ψ(2S) Decay to τ Lepton Pairs

BES Collaboration

Institute of High Energy Physics, Academia Sinica, Beijing 100039

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1995-07-05

Abstract: The decay ψ(2S) →τ^＋τ^－ has been studied by using the 1.27 million ψ(2S) events produced from the BES experiment at the BEPC collider. The τ^＋τ^－ decay branching ratio is for the first time measured to be (3.54±0.61±0.63)×10^－3, which is consistent with the prediction of the hypothesis of e-μ-τ universality. Combiningthis value with the previous leptonic data of ψ(2S), the total width of the ψ(2S) is found to be 251±37keV.